From 40c5eefdcde3a8696881643faeb7e2619ea0322f Mon Sep 17 00:00:00 2001
From: Bastian Kauschke <bastian_kauschke@hotmail.de>
Date: Mon, 30 Mar 2020 19:13:20 +0200
Subject: add test for array len inference

---
 src/test/ui/array-slice-vec/infer_array_len.rs     | 21 +++++++++++++++++++++
 src/test/ui/array-slice-vec/infer_array_len.stderr | 11 +++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 src/test/ui/array-slice-vec/infer_array_len.rs
 create mode 100644 src/test/ui/array-slice-vec/infer_array_len.stderr

(limited to 'src/test/ui/array-slice-vec')

diff --git a/src/test/ui/array-slice-vec/infer_array_len.rs b/src/test/ui/array-slice-vec/infer_array_len.rs
new file mode 100644
index 00000000000..22fe7cb8838
--- /dev/null
+++ b/src/test/ui/array-slice-vec/infer_array_len.rs
@@ -0,0 +1,21 @@
+// see issue #70529
+struct A;
+
+impl From<A> for [u8; 2] {
+    fn from(a: A) -> Self {
+        [0; 2]
+    }
+}
+
+impl From<A> for [u8; 3] {
+    fn from(a: A) -> Self {
+        [0; 3]
+    }
+}
+
+
+fn main() {
+    let a = A;
+    let [_, _] = a.into();
+    //~^ ERROR type annotations needed
+}
diff --git a/src/test/ui/array-slice-vec/infer_array_len.stderr b/src/test/ui/array-slice-vec/infer_array_len.stderr
new file mode 100644
index 00000000000..6eed4ce4f0c
--- /dev/null
+++ b/src/test/ui/array-slice-vec/infer_array_len.stderr
@@ -0,0 +1,11 @@
+error[E0282]: type annotations needed
+  --> $DIR/infer_array_len.rs:19:9
+   |
+LL |     let [_, _] = a.into();
+   |         ^^^^^^ consider giving this pattern a type
+   |
+   = note: type must be known at this point
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0282`.
-- 
cgit 1.4.1-3-g733a5